Showing papers in "Engineering Fracture Mechanics in 2014"

TL;DR: In this paper, the fatigue performance of stainless steel 316L has been investigated using electronoptical techniques and X-ray diffraction in order to shed light on the process-microstructure-property relationships for this alloy.

TL;DR: The results of single-lap shear tests, conducted on specimens with fiber reinforced cementitious matrix (FRCM) composite strips bonded to concrete blocks, are presented in this paper.

TL;DR: In this article, the authors provide an overview on the current state of fracture mechanics application to weldments and discuss the specific features which any fracture mechanics analysis of weldments has to take into account.

TL;DR: The proposed floating node method is particularly suited for modelling weak and cohesive discontinuities and for the representation of complex crack networks and can model multiple plies and interfaces of a composite laminate, and both matrix crack and delamination, within a user-defined element.

TL;DR: In this article, a modification of the stress triaxiality-based Lemaitre damage model was proposed to predict the ductile fracture at low and shear-dominated loadings, where the influence of the third stress invariant on damage evolution was introduced through the Lode parameter.

TL;DR: In this paper, a coupled fracture mode generated by a nominal anti-plane (Mode III) loading applied to linear elastic plates weakened by a straight through-the-thickness crack was studied.

TL;DR: In this paper, the authors investigated the fracture behavior of asphalt mixture using randomly generated two-dimensional (2-D) microstructure models and provided both qualitative and quantitative results.

TL;DR: In this article, the authors presented a concise multiaxial creep-damage model for creep crack growth considering the cavity growth and micro-crack interaction, which is based on power-law creep controlled cavity growth theory.

TL;DR: In this article, a hybrid discontinuous Galerkin/cohesive zone model method for nonlinear fracture mechanics problems is presented, where cohesive interface elements are placed at element surfaces prior to the simulation of which artificial compliance is removed by a discontinuousGalerkin formulation.

TL;DR: In this article, a fracture locus is obtained by performing micromechanical analyses on the computational cells by deforming computational cells along paths of predefined stress states described by two dimensionless stress-state parameters: stress triaxiality (T σ ) and Lode parameter (L ).

TL;DR: In this article, the authors performed fracture tests on sandstone specimens under three-point bending with a variety of notch positions to achieve KII/KI = 0.12% at peak load, the maximum crack opening displacement measured by digital image correlation was 45 μm under mixed mode loading and 30μm under mode I, and these values were used to determine the length of the cohesive zone.

TL;DR: In this article, the size effect law of double edge notched specimens was used to obtain the crack resistance curve of polymer composites reinforced by unidirectional fibres, and the results showed a good correlation between the crack resilience curve obtained using the size-effect law and that previously measured for one of the material systems using the compact tension test.

TL;DR: In this article, the fracture response of pervious concrete specimens proportioned for different porosities, as a function of the pore structure features and fiber volume fraction, is studied.

TL;DR: In this paper, the in-plane crack problem in piezoelectric semiconductors under a transient thermal load is solved in a local weak-form on small fictitious subdomains.

TL;DR: In this article, the authors presented the polyurethane foam fracture toughness results obtained for different foam densities and two types of specimens were used for determining fracture toughness in modes I, II and a mixed one, and the size effect, loading speed and loading direction were investigated.

TL;DR: In this article, the authors developed the numerical manifold method as a tool to investigate the progressive failure in rock slopes and captured the entire processes of the progressive slide surface development related to crack initiation, propagation, coalescence and degradation to eventual catastrophic failure.

TL;DR: In this article, a failure model for crack initiation in single lap joints (SLJ) is presented based on Finite Fracture Mechanics and makes use of a coupled stress and energy criterion.

TL;DR: The implementation of a small library of three-dimensional cohesive elements, formatted as user-defined elements, for compatibility with the commercial finite element software ABAQUS, is presented.

TL;DR: In this article, an approach to implementation of models of elasticity, plasticity and fracture of heterogeneous materials within the framework of discrete element method (DEM) is proposed, based on constructing many-body forces of element-element interaction within the formalism of simply deformable element approximation of generalized concept of DEM.

TL;DR: In this paper, the in-plane and out-of-plane constraint effects of fracture toughness were studied for high-strength carbon steel 34 ХН3МА with single edge-notched bend specimens under three-point bending and compact specimens under tension.

TL;DR: In this paper, a load-independent creep constraint parameter R * was proposed, and its load-independence was validated using finite element results in previous studies, and a fixed distance r ǫ = 0.2mm from a crack tip was chosen to define the R *, and the Rǫ at steady-state creep can be used to evaluate constraint level with little conservatism for whole creep time.

TL;DR: In this paper, the fracture resistance of a dissimilar metal welded joint was measured by single edge-notched bend specimens with different in-plane and out-of-plane constraints.

TL;DR: In this article, the authors investigated the fracture behavior of Neyriz marble by using two different test configurations: (1) the center cracked circular disk specimen subjected to mode I loading, and (2) the edge cracked triangular samples under mixed mode loading.

TL;DR: A modified maximum tangential stress (MMTS) criterion is suggested for predicting the fracture initiation angles which takes into account the effect of I-stress as well as the singular terms as mentioned in this paper.

TL;DR: In this paper, the growth rates of optically dark areas (ODA) and fish-eyes (FE) were quantified in kHz-ultrasonic fatigue tests on SUJ2 and 17-4PH steels at constant and repeated two-step amplitudes.

TL;DR: In this paper, the authors used finite element analysis with the adoption of a continuum damage material model to capture the ductile-brittle transition in rock cutting, and produced the size effect law.

TL;DR: In this paper, the authors investigated the dependency of the fracture behavior of concrete-rock interfaces on the mode mixity ratio using experimental and numerical methods, and proposed a scaled boundary finite element method to compute the fracture toughness and fracture energy.

TL;DR: In this paper, the authors compared three unidirectional carbon fiber reinforced composites, one with thermoplastic (poly-ether-et-ketone) and two with thermoset (epoxy) matrix tested at five laboratories.

TL;DR: In this paper, two-dimensional linear and quadratic (i.e., second-order) cohesive elements were used to model crack initiation and growth in Abaqus using a user subroutine.

TL;DR: In this article, a crack growth mechanism is unraveled in lights of Molecular Dynamics (MD) by simulating the uniaxial tension test on the C-S-H gel with voids ranging from 0.5nm to 5nm.